PSI - Issue 13

Igor Golovnev et al. / Procedia Structural Integrity 13 (2018) 1632–1637 Author name / Structural Integrity Procedia 00 (2018) 000–000

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4. Conclusions

Analysis of the initial moment of the nanostructure failure on the atomic level under the action of the external harmonic uniaxial extension described as ( ) 0 sin X V V t ω = , enables to formulate the following criterion of the defect formation (crystal structure failure beginning): On the stage of elastic processes in the nanostructure, the value of the maximal dispersion of the atomic planes coincides with this characteristic after the nanostructure cooling. The irreversible changes in the nanostructure begin with the critical value of the maximal dispersion which is 0.0652964 (see Fig. 8).

Acknowledgements

The work is financially supported by the Russian Foundation for Basic Research, the grant No 17-01-00068 A «Investigation of the temperature effect on the development of the fatigue fracture of metal nanostructure ».

References

Voter, A.F., 1993. Embedded Atom Method Potentials for Seven FCC Metals: Ni, Pd, Pt, Cu, Ag, Au, and Al. In: Los Alamos Unclassified Technical Report # LA-UR 93-3901. Golovneva, Е.I., Golovnev, I.F., Fomin, V.М., 2003. Simulation of Quasi-static Processes in Crystals by the Molecular Dynamics Method. Physical mesomechanics 6, 6, 5–10. Allen, M.P., Tildesley, D.J., 1987. Computer Simulation of Liquids. In: Clarendon Press, New York, pp. 385.